“Obstinacy is the result of the will forcing itself into the place of the intellect.”
                                        
                                        Vol. 2, Ch. 26, § 321 
Parerga and Paralipomena (1851), Counsels and Maxims
                                    
On War (1832), Book 1
“Obstinacy is the result of the will forcing itself into the place of the intellect.”
                                        
                                        Vol. 2, Ch. 26, § 321 
Parerga and Paralipomena (1851), Counsels and Maxims
                                    
                                        
                                        Plato, Republic, T. Griffith, trans. (2000), 587a 
Plato, Republic
                                    
Source: Words of a Sage : Selected thoughts of African Spir (1937), p. 39.
On the Principles of Genial Criticism (1814)
                                        
                                        "On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856) 
Context: The objects of instruction in purely scientific mechanics and physics are, first, to produce in the student that improvement of the understanding which results from the cultivation of natural knowledge, and that elevation of mind which flows from the contemplation of the order of the universe; and secondly, if possible, to qualify him to become a scientific discoverer.<!--p. 176
                                    
On the definition of space: Reach Into Space http://www.time.com/time/magazine/article/0,9171,892531,00.html, Time, 1959-05-04.